Same here; I've been fascinated by Lisp machines for the past decade, but they are very difficult to get a hold of, and when they do show up for sale, they are prohibitively expensive. When I went to the now-defunct Living Computer Museum in Seattle back in 2019, I saw that there were no Lisp machines available, though I did get to see and use other rare machines such as the Xerox Alto, the Apple Lisa, and the original NeXT cube (I'm glad I finally got to add one to my collection a few years ago). MIT CADR has been made open source for quite some time (https://tumbleweed.nu/lm-3/), and I'm glad that Xerox Interlisp-D is now open source (https://interlisp.org/). However, the holy grail of Lisp machine environments, Symbolics Genera, is still not available as FOSS. Funnily enough, this is fitting since Richard Stallman's frustrations with Symbolics was one of the catalysts behind his starting the GNU Project.

One of the interesting "what could have been" moments of computing history is Apple's exploration of Lisp in the late 1980s and during the first half of the 1990s. Such projects include:

- Apple's original plans for the Newton, which included an OS written in Lisp.

- The Dylan programming language, which I've heard can be thought of as Scheme with the Common Lisp Object System. Dylan was originally designed to be the official language used to develop Newton apps. Originally Dylan had an S-expression syntax, but this was changed to a more Algol-like syntax due to the prevailing opinion among many that an Algol-like syntax would be easier for C/Pascal/C++ programmers to adopt. However, the Newton ended up using a C++-based operating system, and NewtonScript, which wasn't based on a Lisp, was created as the language for developing Newton apps.

- SK8 (https://en.wikipedia.org/wiki/SK8_(programming_language) ), which was dubbed "HyperCard on steroids," was written in Common Lisp.

In an alternate timeline, we could've been using Apple devices built on a Lisp foundation. This is probably the closest we've gotten to Lisp machines on the desktop, as opposed to specialized AI workstations that cost five figures in 1980s dollars.

Then again, things worked out well for Apple after the NeXT purchase. The OpenStep API (which became Cocoa) and Objective-C was (and still is) solid infrastructure than can be thought of as a "pragmatic Smalltalk" desktop, though in recent years I feel Apple has been moving on from NeXT influences and is doing its own thing now with Swift.